Experimental Visibility Rating, HRRR smoke forecast for 06-12-2024 16PDT

Product
Forecast Hour (forecasts 00,06,12,18 go out to hour 48, others to hour 18)
Surface
Loop
0
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48
1000ft
Loop
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48
6000ft
Loop
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48

Experimental Surface Smoke, HRRR smoke forecast for 06-12-2024 16PDT

Product
Forecast Hour (forecasts 00,06,12,18 go out to hour 48, others to hour 18)
Surface
Loop
0
1
2
3
4
5
6
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48

Last 6-hourly Visibility forecast for 06-12-2024 11PDT

Product
Forecast Hour
Surface
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
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29
30
31
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33
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42
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44
45
46
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48
1000ft
Loop
0
1
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9
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33
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48
6000ft
Loop
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44
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46
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48

Last 6-hourly Smoke forecast for 06-12-2024 11PDT

Product
Forecast Hour
Surface
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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42
43
44
45
46
47
48



HRRR visibility product description:
This product is derived from NOAA/NWS HRRR smoke hourly Rapid Refresh updates to support current California wildfire operations. Visibility is calculated by DRI-CEFA-CANSAC based on Malm and Schichtel (2013). Forecasted concentrations of PM2.5 are converted to visibility (in miles AGL) using the algorithm Visual Range (VR) = 870/PM2.5.
Reference: Malm, W.C. and B.A. Schichtel, 2013: Uncertainty associated with estimating a short-term (1-3 hr) particulate matter concentration from a human-sighted visual range. Final report to the Joint Fire Science Program (13-C-01-01).